Subjective Type

(a) State the main points of difference between homogeneous and heterogeneous mixtures. (b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures. Soda-water, Wood, Air, Soil, vinegar, Alcohol and water mixture, petrol and water mixture, chalk and water mixture, sugar and water mixture, copper sulphate solution.

Solution

Homogeneous mixture: 1. A substance that is uniform in composition 2. It has a single phase Heterogenous mixture: 1. Composition is not uniform 2. More than two phases (b) Homogenous mixtures -Soda water, air, vinegar, alcohol and water mixtures, sugar and water mixture, copper sulphate solution. Heterogenous mixture- wood , petrol and water mixtures, chalk and water mixture.

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